An extremely easy to use, concise, and handy way of organizing what your players know about monsters. Every gamer has had a session where the GM has had to improvise when players ask what they know. That can bog down the game as the GM decides what a certain DC reveals, or how much they can tell you without tipping their hand. And sometimes a superior roll gets meager knowledge, while a mediocre roll another time gets the full tome, so to speak. These reference cards give you snippits of knowledge right away, keep the game consistent, and allows play to keep flowing smoothly. An excellent GM's tool that should be added to one's game shelf.